# -*- mode: python -*-
###
#
# (c) 2000-2007 Wijnand Modderman <wijnand at tehmaze dot com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions, and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###

__revision__ = '$Hg:$'

# system imports
import types

# DDB imports
from ddb.log import log
from ddb.settings import *

# Twisted imports
from twisted.web import http, client
from twisted.internet import defer, reactor

class PageGetter(client.HTTPPageGetter):
    def sendCommand(self, command, path):
        if not path:
            path = '/'
        line = '%s %s HTTP/1.0' % (command, path)
        print 'REQUEST', line
        self.transport.write(line + '\r\n')

    def sendHeader(self, name, value):
        line = '%s: %s' % (name, value)
        print 'HEADERS', line
        self.transport.write(line + '\r\n')

class HTTPClient(client.HTTPClientFactory):
    protocol = PageGetter
    def __init__(self, url, method='GET', postdata=None, headers=None,
        agent=HTTP_USERAGENT, timeout=0, cookies=None, followRedirect=1):
        # as t.w.client does a HTTP/1.0 request, send a Host header!
        scheme, host, port, path = client._parse(url)
        client.HTTPClientFactory.__init__(self, url, method, postdata, headers, 
            agent, timeout, cookies, followRedirect)

    def gotHeaders(self, headers):
        client.HTTPClientFactory.gotHeaders(self, headers)
        if self.method == 'HEAD' and self.waiting:
            self.waiting = 0
            self.deferred.callback(headers)

def getPage(url, contextFactory=None, *args, **kwargs):
    """Download an <url> as a string."""
    scheme, host, port, path = client._parse(url)
    factory = HTTPClient(url, *args, **kwargs)
    if scheme == 'https':
        from twisted.internet import ssl
        if contextFactory is None:
            contextFactory = ssl.ClientContextFactory()
        reactor.connectSSL(host, port, factory, contextFactory)
    else:
        reactor.connectTCP(host, port, factory)
    return factory.deferred

def getHeaders(url, contextFactory=None, *args, **kwargs):
    """Download the headers from <url> as a dict."""
    scheme, host, port, path = client._parse(url)
    kwargs['method'] = 'HEAD'
    factory = HTTPClient(url, *args, **kwargs)
    if scheme == 'https':
        from twisted.internet import ssl
        if contextFactory is None:
            contextFactory = ssl.ClientContextFactory()
        reactor.connectSSL(host, port, factory, contextFactory)
    else:
        reactor.connectTCP(host, port, factory)
    return factory.deferred

# vim:ts=4:sw=4:et:
